#include "ImplicitQuadric.h"
#include <vtkActor.h>
#include <vtkBox.h>
#include <vtkCamera.h>
#include <vtkColor.h>
#include <vtkContourFilter.h>
#include <vtkImplicitBoolean.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkQuadric.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSampleFunction.h>

ImplicitQuadric::ImplicitQuadric(QWidget* parent)
	: QMainWindow(parent)
{
	vtkWidget = new QVTKOpenGLNativeWidget(this);
	this->resize(600, 400);
	this->setCentralWidget(vtkWidget);

	// Define colors
	vtkNew<vtkNamedColors> colors;
	vtkColor3d actorColor = colors->GetColor3d("AliceBlue");
	vtkColor3d EdgeColour = colors->GetColor3d("SteelBlue");
	vtkColor3d BackgroundColour = colors->GetColor3d("Silver");

	// create a Quadric
	vtkNew<vtkQuadric> quadric;
	quadric->SetCoefficients(0.5, 1, 0.2, 0, 0.1, 0, 0, 0.2, 0, 0);

	/*The sample function generates a distance function from the implicit
		  function.This is then contoured to get a polygonal surface.*/
	vtkNew<vtkSampleFunction> sample;
	sample->SetImplicitFunction(quadric);
	sample->SetModelBounds(-0.5, 0.5, -0.5, 0.5, -0.5, 0.5);
	sample->SetSampleDimensions(40, 40, 40);
	sample->ComputeNormalsOff();

	// contour
	vtkNew<vtkContourFilter> surface;
	surface->SetInputConnection(sample->GetOutputPort());
	surface->SetValue(0, 0.0);

	// Create a mapper and an actor
	vtkNew<vtkPolyDataMapper> mapper;
	mapper->SetInputConnection(surface->GetOutputPort());
	mapper->ScalarVisibilityOff();
	vtkNew<vtkActor> actor;
	actor->SetMapper(mapper);
	actor->GetProperty()->EdgeVisibilityOn();
	actor->GetProperty()->SetColor(actorColor.GetData());
	actor->GetProperty()->SetEdgeColor(EdgeColour.GetData());

	// A renderer and render window
	vtkNew<vtkRenderer> renderer;
	vtkWidget->renderWindow()->AddRenderer(renderer);

	// add the actor
	renderer->AddActor(actor);
}
